Frameworks to promote reuse A framework is intrinsically incomplete Certain classes or methods are used by the framework but are missing(slots) Some functionality is optional Allowance is made for developer to provide it (hooks) Developers use the services that the framework provides Taken together the services are called the Application Program Interface(APD) www.oseng.com O Lethbridge/Laganiere 2001 Chap 3: Basing Development on Reusable 6© Lethbridge/Laganière 2001 Chap. 3: Basing Development on Reusable Technology 6 Frameworks to promote reuse A framework is intrinsically incomplete • Certain classes or methods are used by the framework, but are missing (slots) • Some functionality is optional — Allowance is made for developer to provide it (hooks) • Developers use the services that the framework provides —Taken together the services are called the Application Program Interface (API)